Processes for preparing 1-butyl-2-[2'-(2H-tetrazol-5-yl) biphenyl-4-ylmethyl]-1H-indole-3-carboxylic acid
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United States of America Patent
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Aug 29, 1995
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N/A
app pub date -
Jan 17, 1995
filing date -
May 27, 1994
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Expired
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Abstract
The present invention relates to processes for preparing 1-butyl-2-[2'-(2H-tetrazol-5-yl)biphenyl-4-ylmethyl]-1H-indole-3-carboxylic acid and to intermediates useful in such processes. The present invention also relates to a process for deprotecting compounds containing a protected 2H-tetrazolyl group, which process comprises reacting a the protected compound with a Lewis acid in the presence of a thiol.
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